Draft-rigging for railway-cars.



15P. ocoNNoR.

DRAFT RIGGING FOR'RAILWAY CARS.

APPLICATION FILED MAR-18| 1915- 1,22, 2135.

' WITNESSES l 1. F. ocoNNoR. DRAFT RIGGING FR RAILWAY CARS.

APPLICATION FILED MAR. I8 1915.

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t2 D 0U Lm 2 P M m w m n W nnrrEn srArEs PATENT. oEEroE.

JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, ASSIGNOR TO WILLIAM H. MINR, OF

CHAZY, NEW YORK.

DRAFT-mesme Fon RAILWAY-GARS.

Specification of Letters jPatent.

Patented May 29, 1917.

Application ledMarch 18,1915. i Serial N o. 15,349.

To all whom t may concern:

Be it known that I, JOHN F. OCONNOR,

ra citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,.have invented a certain new and useful Improvement in Draft-Riggings for Railway-Cars, of which the following is a full, clear, concise, reference being had to the accompanying drawings, forming a part of this specification. i

.This invention relates to improvements in draft riggings for railway cars.

An object of the invention is to provide a high capacity friction gear for railway car draft riggings and one in which the release is always certain.

Another object of the invention is to provide a friction gear for railway draft riggings employing wedging orl spreading means consisting of a main wedge or spreader and auxiliary wedges or spreaders `interposed between the main wedge and the friction shoes.

The invention furthermore consists in the improvementsv in the" parts and devices and in the novel combinations of the parts andl devices, claimed. .y

In the drawing forming a part of this specification, Figure 1 is a longitudinal vertical sectional view of a draft rigging embodying my improyements, showing the gear in full release. Fig.` 2 is a horizontalsectional view taken 'substantially on the line 2-2 of Fig. 1 and showing the parts under full buff. Figs. 3 and 4 are vertical secyas herein shown, described or tional views taken substantially on the lines 3 3 and 4-4 of-F-ig. 1 and Figs. 5and 6 are detail, perspective views of an auxiliary wedging member and friction shoe respectively.

In saiddrawing, 10-10 denote the center sills, the same havingsecured theretorear` stops 11 and front stops 12. The draw-bar 13 is connected by a coupler key 14 with a cast steel yoke l5 having a hooded forward end 16, the key 14 being slidable in suitable slots provided in the center sills and front stops 12.

The gear proper comprises a casting having a friction shell portion 160, spring casing 17y and integral rear follower 18. Mounted within said spring casing is a spring 19 comprising an inner and an outerl coil.

and exact description Mounted within the friction shell 160 is a plurality of friction shoes 20 circularl arranged, each shoe 20 having on the inner face thereof a'box-like recess 21 in which is seated an auxiliary 'wedgemember 22 in the form of a rocker. -Each rocker 22 has a substantially convex outer surface 23 which permits of the rocking movement of the rocker.

and the rockers 22 isa wedge 24, said wedge 24 engaging-a spring follower plate 25. Interposed between the front follower 26 and the rockers 22 is another Awedge member 27 corresponding to the wedge 24 but arranged inthe opposite position relatively thereto. Interposed between each of the wedges 24 and 27 and the rockers 22 are pairs ofantifriction rollers 28 and 29, the latter being seated in suitable recesses 3,0 and 31 respectively. As clearly shown in Fig. 1, the opposed adjacent ends of the wedges 24 and 27 are separated and permit of relative ,movement therebetween occasioned by the Interposed between the spring 19 engagement with the inner faces of the friction shoes. Upon inward movement of the draw-bar, the wedge 27 is forced inwardly, thuscausing the anti-friction rollers -29 to roll slightly up the inclined surfaces of their corresponding seats 31 which will thereby cause the rockers to oscillate about their convex surfaces which bear against the vinner faces of the shoes. lThis in turn causes the rollers 28 to travel on the wedge faces of the wedge 24 and forces the same inwardly, the movement of al1 the aforesaid elements being independent of the friction shoes Ywhich remain stationary because of the great frictional contact between the same and the friction shell. The wedge 27, rockers`22 and wedge 24 continue their inward independent movement buntil the front follower 26 engages the outer ends of the fr iction shoes, whereupon the latter move 1nwardly resisted by the spring 19 which now acts through the wedge 24 and auxiliary rocker wedges 22. 'Upon release, the reverse Y while the rockers 22 are oscillated back to' means of the preceding action-takes place,'that is,

the friction ,shoes willl remain stationary their original position and the wedges 2li and 27 are permitted to move outwardly until the spring follower 25 engages the inner edges of the friction shoes, whereupon all the parts will move outwardly in unison until the full release is attained.

l claim 1. A friction gear for draft riggings comprising, a friction shell, friction shoes cooperable therewith, a spring, and wedging means between the spring and shoes, said comprising oppositely arranged spreaders, one behind the other, and rockers between said spreaders and Shoes.

2. A friction gear for draft riggings comprising a friction shell, friction shoes, a spring, wedging means including spreaders, rockers between the spreaders and shoes, and anti-friction rollers between the rockers and spreaders.

3. A friction gear comprising a friction shell, friction shoes coperable therewith, a spring, and wedging means comprising oppositely arranged spreaders, and rockers interposed between the spreaders and shoes.

4. A friction gear comprising a friction shell, friction shoes coperable therewith, a spring, and wedging means comprising oppositely arranged spreaders, and rockers intei-posed between the spreaders and shoes, said rockers overlapping the ends of both spreaders..

5. A friction gear comprising a friction shell, friction shoes, a spring, and wedging means including a pair vof spreaders, and rockers, corresponding in number to the friction shoes, interposed between the shoes and spreaders, said rockers being mounted in recesses on the inner faces of the shoes.

6. A friction gear for draft riggings comprising a shell, friction shoes, spring, a follower, and wedging means interposed between the spring and follower and locatedwithin the friction shoes, said wedging means including a pair of oppositely arranged spreaders, the outer end of one spreader engaging'the follower and the inner end of the other spreader acting against feaaaaa said spring, and rockers interposed between said spreaders and shoes. 7. A friction gear for draft riggings comprising a shell, a spring, a plurality of friction shoes slidable relatively to said shell and having their ends normally extended outside of the shell, a follower normally spaced from the outer ends of said shoes, and wedging meansinterposed between said spring and shoes, said wedging means including a pair of spreaders, and rockers interposed between the spreaders and shoes, the spreaders and rockers being movable independently of the shoes during initial portions of the actuation and release of the gear.

8. A friction gear for draft riggings comprising a friction shell, a plurality of friction shoes coperable therewith, each of said shoes having a recess on its inner face, a rocker mounted in each of said recesses, a pair of oppositely arranged spreaders mounted within said shoes and rockers, antifriction rollers interposed between said rockers and spreaders, and a spring for resisting movement of the friction shoes, spreaders and rockers, said rockers being tilted on the friction shoes and while the latter are stationary during initial portio'ns of the actuation of the gear.

9. A friction gear for draft riggings comprising a friction shell having a spring chamber, a spring mounted within said chamber, friction shoes coperable with said shell and having their outer ends extended. beyond the end of thefriction shell, a follower spaced from the ends of said shoes, a rocker mounted in a recess on the inner face of each of said shoes, and oppositely arranged spreaders mounted within said shoes and rockers, one of saidspreaders being in engagement with the follower and the other of said spreaders acting directly upon the spring, said spreaders and rockers being actuated independently of the friction shoes during the initial operation of the gear.

JOHN F. OCONNOR. 

